| 几何微扰动对脱体涡非对称性影响的数值分析 |
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| 引用本文： | 蔡晋生 贾剑波. 几何微扰动对脱体涡非对称性影响的数值分析[J]. 空气动力学学报, 1997, 15(2): 211-215 |
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| 作者姓名： | 蔡晋生 贾剑波 |
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| 作者单位： | [1]西北工业大学 [2]北京航空航天大学 |
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| 摘 要： | 利用拟压缩性方法，Ｂｅａｍ－Ｗａｒｍｉｎｇ近似因式分解格式数值求解三维定常不可压缩Ｎａｖｉｅｒ－Ｓｔｏｋｅｓ方程采用Ｄｅｇａｎｉ－Ｓｃｈｉｆｆ修正的Ｂａｌｄｗｉｎ－Ｌｏｍａｘ代数湍流模型，计算了绕尖头正切拱型旋成柱体的大迎角大雷诺数脱体涡流场，计算结果表明，在柱体头部施加微小的非对称几何扰动时，可以得到与实验相符的非对称脱体涡。
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| 关 键 词： | 拟压缩性法 几何扰动 非对称脱体涡 N－S方程 |
Numerical Simulation of the Effect of Geometrical Disturbances on Vortex Asymmetry |
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| Cai Jinsheng. Numerical Simulation of the Effect of Geometrical Disturbances on Vortex Asymmetry[J]. Acta Aerodynamica Sinica, 1997, 15(2): 211-215 |
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| Authors: | Cai Jinsheng |
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| Abstract: | The method of pseudocompressibility was used in solving the three-dimensional steady incompressible Navier-Stokes flows. The solution procedure cmploys the Beam-Warming implicit approximate factorization scheme. The Baldwin-Lomax algebraic turbulent model together with the Degani-Schiff modification was used for Keynolds -averaged Navier -Stokes cquations to numerically simulate high-incidence high Reynolds number vortical flow about a tangent-ogivc cylinder. To reproduce the experimentally observed asymmetric vortices, it was found cssential to introduce a small asymmetric geometrical disturbance near the body apcx. |
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| Keywords: | method of pseudocompressibility gcometrical disturbance asymmetric vortex |
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